Crispy Peanut Butter Cereal Bars

2/3 Cup light corn syrup
1/4 Cup packed brown sugar
1 Cup peanut butter
1/2 Teaspoon vanilla
4 Cups rice cereal
In a medium saucepan, combine corn syrup and brown sugar. Cook and stir till mixture comes to a full rolling boil. Remove saucepan from heat and stir in peanut butter and vanilla. Stir in crisp rice cereal. Press into an ungreased 9X9X2 inch pan. Chill about 1 hour or till firm. Cut into bars.